I support giving President Obama the ability to negotiate and complete new trade agreements with some of the fastest-growing economies in the world.

I am not a professional politician.

We have to start grounding our policies in facts and recognize that a strong economy is critical for funding progressive priorities.

Oil is largely our energy past, and Keystone does little to respond to the actual challenges and opportunities before us.

Climate change poses tremendous threat to water resources, as there is inconsistency in the rains.

I always felt that if someone shot me, it would be great for the environmental movement, because they would make me a martyr. Our biggest fear was our children, because there was a tremendous amount of threat and intimidation, and my wife was terrified that the children might be grabbed or assaulted in some way. That was the real fear.

Science changes, and it's odd to me that scientists say, 'Never be skeptical,' because it was in the mid-'70s when they were saying we're sunk because we're going to have global climate cooling.

Geoengineering - the deliberate, large-scale manipulation of the earth's climate to offset global warming - is a nightmare fix for climate change.